becab8c9be3fe14cbc8223ab6e5e284e062339dc
1 /****************************************************************************
2 * RRDtool 1.2.0 Copyright by Tobi Oetiker, 1997-2005
3 ****************************************************************************
4 * rrd_gfx.c graphics wrapper for rrdtool
5 **************************************************************************/
7 /* #define DEBUG */
9 #ifdef DEBUG
10 # define DPRINT(x) (void)(printf x, printf("\n"))
11 #else
12 # define DPRINT(x)
13 #endif
14 #include "rrd_tool.h"
15 #include <png.h>
16 #include <ft2build.h>
17 #include FT_FREETYPE_H
18 #include FT_GLYPH_H
20 #include "rrd_gfx.h"
21 #include "rrd_afm.h"
23 /* lines are better drawn on the pixle than between pixles */
24 #define LINEOFFSET 0.5
26 typedef struct gfx_char_s *gfx_char;
27 struct gfx_char_s {
28 FT_UInt index; /* glyph index */
29 FT_Vector pos; /* location from baseline in 26.6 */
30 FT_Glyph image; /* glyph bitmap */
31 };
33 typedef struct gfx_string_s *gfx_string;
34 struct gfx_string_s {
35 unsigned int width;
36 unsigned int height;
37 size_t count; /* number of characters */
38 gfx_char glyphs;
39 size_t num_glyphs;
40 FT_BBox bbox;
41 FT_Matrix transform;
42 };
44 /* compute string bbox */
45 static void compute_string_bbox(gfx_string string);
47 /* create a freetype glyph string */
48 gfx_string gfx_string_create ( FT_Face face,
49 const char *text, int rotation, double tabwidth);
51 /* create a freetype glyph string */
52 static void gfx_string_destroy ( gfx_string string );
54 static
55 gfx_node_t *gfx_new_node( gfx_canvas_t *canvas,enum gfx_en type){
56 gfx_node_t *node = art_new(gfx_node_t,1);
57 if (node == NULL) return NULL;
58 node->type = type;
59 node->color = 0x0; /* color of element 0xRRGGBBAA alpha 0xff is solid*/
60 node->size =0.0; /* font size, line width */
61 node->path = NULL; /* path */
62 node->points = 0;
63 node->points_max =0;
64 node->closed_path = 0;
65 node->filename = NULL; /* font or image filename */
66 node->text = NULL;
67 node->x = 0.0;
68 node->y = 0.0; /* position */
69 node->angle = 0;
70 node->halign = GFX_H_NULL; /* text alignement */
71 node->valign = GFX_V_NULL; /* text alignement */
72 node->tabwidth = 0.0;
73 node->next = NULL;
74 if (canvas->lastnode != NULL){
75 canvas->lastnode->next = node;
76 }
77 if (canvas->firstnode == NULL){
78 canvas->firstnode = node;
79 }
80 canvas->lastnode = node;
81 return node;
82 }
84 gfx_canvas_t *gfx_new_canvas (void) {
85 gfx_canvas_t *canvas = art_new(gfx_canvas_t,1);
86 canvas->firstnode = NULL;
87 canvas->lastnode = NULL;
88 canvas->imgformat = IF_PNG; /* we default to PNG output */
89 canvas->interlaced = 0;
90 canvas->zoom = 1.0;
91 return canvas;
92 }
94 /* create a new line */
95 gfx_node_t *gfx_new_line(gfx_canvas_t *canvas,
96 double X0, double Y0,
97 double X1, double Y1,
98 double width, gfx_color_t color){
99 return gfx_new_dashed_line(canvas, X0, Y0, X1, Y1, width, color, 0, 0);
100 }
102 gfx_node_t *gfx_new_dashed_line(gfx_canvas_t *canvas,
103 double X0, double Y0,
104 double X1, double Y1,
105 double width, gfx_color_t color,
106 double dash_on, double dash_off){
108 gfx_node_t *node;
109 ArtVpath *vec;
110 node = gfx_new_node(canvas,GFX_LINE);
111 if (node == NULL) return NULL;
112 vec = art_new(ArtVpath, 3);
113 if (vec == NULL) return NULL;
114 vec[0].code = ART_MOVETO_OPEN; vec[0].x=X0+LINEOFFSET; vec[0].y=Y0+LINEOFFSET;
115 vec[1].code = ART_LINETO; vec[1].x=X1+LINEOFFSET; vec[1].y=Y1+LINEOFFSET;
116 vec[2].code = ART_END; vec[2].x=0;vec[2].y=0;
118 node->points = 3;
119 node->points_max = 3;
120 node->color = color;
121 node->size = width;
122 node->dash_on = dash_on;
123 node->dash_off = dash_off;
124 node->path = vec;
125 return node;
126 }
128 /* create a new area */
129 gfx_node_t *gfx_new_area (gfx_canvas_t *canvas,
130 double X0, double Y0,
131 double X1, double Y1,
132 double X2, double Y2,
133 gfx_color_t color) {
135 gfx_node_t *node;
136 ArtVpath *vec;
137 node = gfx_new_node(canvas,GFX_AREA);
138 if (node == NULL) return NULL;
139 vec = art_new(ArtVpath, 5);
140 if (vec == NULL) return NULL;
141 vec[0].code = ART_MOVETO; vec[0].x=X0; vec[0].y=Y0;
142 vec[1].code = ART_LINETO; vec[1].x=X1; vec[1].y=Y1;
143 vec[2].code = ART_LINETO; vec[2].x=X2; vec[2].y=Y2;
144 vec[3].code = ART_LINETO; vec[3].x=X0; vec[3].y=Y0;
145 vec[4].code = ART_END; vec[4].x=0; vec[4].y=0;
147 node->points = 5;
148 node->points_max = 5;
149 node->color = color;
150 node->path = vec;
152 return node;
153 }
155 /* add a point to a line or to an area */
156 int gfx_add_point (gfx_node_t *node,
157 double x, double y){
158 if (node == NULL) return 1;
159 if (node->type == GFX_AREA) {
160 double X0 = node->path[0].x;
161 double Y0 = node->path[0].y;
162 node->points -= 2;
163 art_vpath_add_point (&(node->path),
164 &(node->points),
165 &(node->points_max),
166 ART_LINETO,
167 x,y);
168 art_vpath_add_point (&(node->path),
169 &(node->points),
170 &(node->points_max),
171 ART_LINETO,
172 X0,Y0);
173 art_vpath_add_point (&(node->path),
174 &(node->points),
175 &(node->points_max),
176 ART_END,
177 0,0);
178 } else if (node->type == GFX_LINE) {
179 node->points -= 1;
180 art_vpath_add_point (&(node->path),
181 &(node->points),
182 &(node->points_max),
183 ART_LINETO,
184 x+LINEOFFSET,y+LINEOFFSET);
185 art_vpath_add_point (&(node->path),
186 &(node->points),
187 &(node->points_max),
188 ART_END,
189 0,0);
191 } else {
192 /* can only add point to areas and lines */
193 return 1;
194 }
195 return 0;
196 }
198 void gfx_close_path (gfx_node_t *node) {
199 node->closed_path = 1;
200 if (node->path[0].code == ART_MOVETO_OPEN)
201 node->path[0].code = ART_MOVETO;
202 }
204 /* create a text node */
205 gfx_node_t *gfx_new_text (gfx_canvas_t *canvas,
206 double x, double y, gfx_color_t color,
207 char* font, double size,
208 double tabwidth, double angle,
209 enum gfx_h_align_en h_align,
210 enum gfx_v_align_en v_align,
211 char* text){
212 gfx_node_t *node = gfx_new_node(canvas,GFX_TEXT);
214 node->text = strdup(text);
215 node->size = size;
216 node->filename = strdup(font);
217 node->x = x;
218 node->y = y;
219 node->angle = angle;
220 node->color = color;
221 node->tabwidth = tabwidth;
222 node->halign = h_align;
223 node->valign = v_align;
224 #if 0
225 /* debugging: show text anchor
226 green is along x-axis, red is downward y-axis */
227 if (1) {
228 double a = 2 * M_PI * -node->angle / 360.0;
229 double cos_a = cos(a);
230 double sin_a = sin(a);
231 double len = 3;
232 gfx_new_line(canvas,
233 x, y,
234 x + len * cos_a, y - len * sin_a,
235 0.2, 0x00FF0000);
236 gfx_new_line(canvas,
237 x, y,
238 x + len * sin_a, y + len * cos_a,
239 0.2, 0xFF000000);
240 }
241 #endif
242 return node;
243 }
245 int gfx_render(gfx_canvas_t *canvas,
246 art_u32 width, art_u32 height,
247 gfx_color_t background, FILE *fp){
248 switch (canvas->imgformat) {
249 case IF_PNG:
250 return gfx_render_png (canvas, width, height, background, fp);
251 case IF_SVG:
252 return gfx_render_svg (canvas, width, height, background, fp);
253 case IF_EPS:
254 return gfx_render_eps (canvas, width, height, background, fp);
255 case IF_PDF:
256 return gfx_render_pdf (canvas, width, height, background, fp);
257 default:
258 return -1;
259 }
260 }
262 static void gfx_string_destroy ( gfx_string string ) {
263 unsigned int n;
264 if (string->glyphs) {
265 for (n=0; n<string->num_glyphs; ++n)
266 FT_Done_Glyph (string->glyphs[n].image);
267 free (string->glyphs);
268 }
269 free (string);
270 }
273 double gfx_get_text_width ( gfx_canvas_t *canvas,
274 double start, char* font, double size,
275 double tabwidth, char* text, int rotation){
276 switch (canvas->imgformat) {
277 case IF_PNG:
278 return gfx_get_text_width_libart (start, font, size, tabwidth, text, rotation);
279 case IF_SVG: /* fall through */
280 case IF_EPS:
281 case IF_PDF:
282 return afm_get_text_width(start, font, size, tabwidth, text);
283 default:
284 return size * strlen(text);
285 }
286 }
288 double gfx_get_text_width_libart (
289 double start, char* font, double size,
290 double tabwidth, char* text, int rotation){
292 int error;
293 double text_width=0;
294 FT_Face face;
295 FT_Library library=NULL;
296 gfx_string string;
298 FT_Init_FreeType( &library );
299 error = FT_New_Face( library, font, 0, &face );
300 if ( error ) return -1;
301 error = FT_Set_Char_Size(face, size*64,size*64, 100,100);
302 if ( error ) return -1;
304 string = gfx_string_create( face, text, rotation,tabwidth);
305 text_width = string->width;
306 gfx_string_destroy(string);
307 FT_Done_FreeType(library);
308 return text_width/64;
309 }
311 static void gfx_libart_close_path(gfx_node_t *node, ArtVpath **vec)
312 {
313 /* libart must have end==start for closed paths,
314 even if using ART_MOVETO and not ART_MOVETO_OPEN
315 so add extra point which is the same as the starting point */
316 int points_max = node->points; /* scaled array has exact size */
317 int points = node->points - 1;
318 art_vpath_add_point (vec, &points, &points_max, ART_LINETO,
319 (**vec).x, (**vec).y);
320 art_vpath_add_point (vec, &points, &points_max, ART_END, 0, 0);
321 }
324 /* find bbox of a string */
325 static void compute_string_bbox(gfx_string string) {
326 unsigned int n;
327 FT_BBox bbox;
329 bbox.xMin = bbox.yMin = 32000;
330 bbox.xMax = bbox.yMax = -32000;
331 for ( n = 0; n < string->num_glyphs; n++ ) {
332 FT_BBox glyph_bbox;
333 FT_Glyph_Get_CBox( string->glyphs[n].image, ft_glyph_bbox_gridfit,
334 &glyph_bbox );
335 if (glyph_bbox.xMin < bbox.xMin) {
336 bbox.xMin = glyph_bbox.xMin;
337 }
338 if (glyph_bbox.yMin < bbox.yMin) {
339 bbox.yMin = glyph_bbox.yMin;
340 }
341 if (glyph_bbox.xMax > bbox.xMax) {
342 bbox.xMax = glyph_bbox.xMax;
343 }
344 if (glyph_bbox.yMax > bbox.yMax) {
345 bbox.yMax = glyph_bbox.yMax;
346 }
347 }
348 if ( bbox.xMin > bbox.xMax ) {
349 bbox.xMin = 0;
350 bbox.yMin = 0;
351 bbox.xMax = 0;
352 bbox.yMax = 0;
353 }
354 string->bbox.xMin = bbox.xMin;
355 string->bbox.xMax = bbox.xMax;
356 string->bbox.yMin = bbox.yMin;
357 string->bbox.yMax = bbox.yMax;
358 }
360 /* create a free type glyph string */
361 gfx_string gfx_string_create(FT_Face face,const char *text,
362 int rotation, double tabwidth)
363 {
365 FT_GlyphSlot slot = face->glyph; /* a small shortcut */
366 FT_Bool use_kerning;
367 FT_UInt previous;
368 FT_Vector ft_pen;
370 gfx_string string;
371 gfx_char glyph; /* current glyph in table */
372 unsigned int n;
373 int error;
374 int gottab = 0;
375 ft_pen.x = 0; /* start at (0,0) !! */
376 ft_pen.y = 0;
378 string = (gfx_string) malloc (sizeof(struct gfx_string_s));
379 string->width = 0;
380 string->height = 0;
381 string->count = strlen (text);
382 string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
383 string->num_glyphs = 0;
384 string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
385 string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
386 string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
387 string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
389 use_kerning = FT_HAS_KERNING(face);
390 previous = 0;
391 glyph = string->glyphs;
392 for (n=0; n<string->count;glyph++) {
393 FT_Vector vec;
394 /* handle the tabs ...
395 have a witespace glyph inserted, but set its width such that the distance
396 of the new right edge is x times tabwidth from 0,0 where x is an integer. */
397 unsigned char letter = text[n];
399 gottab = 0;
400 if (letter == '\\' && n+1 < string->count && text[n+1] == 't'){
401 /* we have a tab here so skip the backslash and
402 set t to ' ' so that we get a white space */
403 gottab = 1;
404 n++;
405 letter = ' ';
406 }
407 if (letter == '\t'){
408 letter = ' ';
409 gottab = 1 ;
410 }
411 /* initialize each struct gfx_char_s */
412 glyph->index = 0;
413 glyph->pos.x = 0;
414 glyph->pos.y = 0;
415 glyph->image = NULL;
417 glyph->index = FT_Get_Char_Index( face, letter );
419 /* compute glyph origin */
420 if ( use_kerning && previous && glyph->index ) {
421 FT_Vector kerning;
422 FT_Get_Kerning (face, previous, glyph->index,
423 ft_kerning_default, &kerning);
424 ft_pen.x += kerning.x;
425 ft_pen.y += kerning.y;
426 }
428 /* load the glyph image (in its native format) */
429 /* for now, we take a monochrome glyph bitmap */
430 error = FT_Load_Glyph (face, glyph->index, FT_LOAD_DEFAULT);
431 if (error) {
432 fprintf (stderr, "couldn't load glyph: %c\n", letter);
433 continue;
434 }
435 error = FT_Get_Glyph (slot, &glyph->image);
436 if (error) {
437 fprintf (stderr, "couldn't get glyph from slot: %c\n", letter);
438 continue;
439 }
440 /* if we are in tabbing mode, we replace the tab with a space and shift the position
441 of the space so that its left edge is where the tab was supposed to land us */
442 if (gottab){
443 /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
444 ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
445 }
446 /* store current pen position */
447 glyph->pos.x = ft_pen.x;
448 glyph->pos.y = ft_pen.y;
451 ft_pen.x += slot->advance.x;
452 ft_pen.y += slot->advance.y;
454 /* rotate glyph */
455 vec = glyph->pos;
456 FT_Vector_Transform (&vec, &string->transform);
457 error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
458 if (error) {
459 fprintf (stderr, "couldn't transform glyph\n");
460 continue;
461 }
463 /* convert to a bitmap - destroy native image */
464 error = FT_Glyph_To_Bitmap (&glyph->image, FT_RENDER_MODE_NORMAL, 0, 1);
465 if (error) {
466 fprintf (stderr, "couldn't convert glyph to bitmap\n");
467 continue;
468 }
470 /* increment number of glyphs */
471 previous = glyph->index;
472 string->num_glyphs++;
473 n++;
475 }
476 /* printf ("number of glyphs = %d\n", string->num_glyphs);*/
477 compute_string_bbox( string );
478 /* the last character was a tab */
479 if (gottab) {
480 string->width = ft_pen.x;
481 } else {
482 string->width = string->bbox.xMax - string->bbox.xMin;
483 }
484 string->height = string->bbox.yMax - string->bbox.yMin;
486 return string;
487 }
490 static int gfx_save_png (art_u8 *buffer, FILE *fp,
491 long width, long height, long bytes_per_pixel);
492 /* render grafics into png image */
494 int gfx_render_png (gfx_canvas_t *canvas,
495 art_u32 width, art_u32 height,
496 gfx_color_t background, FILE *fp){
499 FT_Library library;
500 gfx_node_t *node = canvas->firstnode;
501 /*
502 art_u8 red = background >> 24, green = (background >> 16) & 0xff;
503 art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
504 */
505 unsigned long pys_width = width * canvas->zoom;
506 unsigned long pys_height = height * canvas->zoom;
507 const int bytes_per_pixel = 4;
508 unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
509 art_u8 *buffer = art_new (art_u8, rowstride*pys_height);
510 /* fill that buffer with out background color */
511 gfx_color_t *buffp;
512 long i;
513 for (i=0,buffp=(gfx_color_t *)buffer;
514 i<pys_width*pys_height;
515 i++){
516 *(buffp++)=background;
517 }
518 FT_Init_FreeType( &library );
519 while(node){
520 switch (node->type) {
521 case GFX_LINE:
522 case GFX_AREA: {
523 ArtVpath *vec,*pvec;
524 double dst[6];
525 ArtSVP *svp,*svpt;
526 art_affine_scale(dst,canvas->zoom,canvas->zoom);
527 vec = art_vpath_affine_transform(node->path,dst);
528 if (node->closed_path)
529 gfx_libart_close_path(node, &vec);
530 /* gfx_round_scaled_coordinates(vec); */
531 pvec = art_vpath_perturb(vec);
532 art_free(vec);
533 if(node->type == GFX_LINE){
534 svp = art_svp_vpath_stroke ( pvec, ART_PATH_STROKE_JOIN_ROUND,
535 ART_PATH_STROKE_CAP_ROUND,
536 node->size*canvas->zoom,4,0.25);
537 } else {
538 svp = art_svp_from_vpath ( pvec );
539 svpt = art_svp_uncross( svp );
540 art_svp_free(svp);
541 svp = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO);
542 art_svp_free(svpt);
543 }
544 art_free(pvec);
545 /* this is from gnome since libart does not have this yet */
546 gnome_print_art_rgba_svp_alpha (svp ,0,0, pys_width, pys_height,
547 node->color, buffer, rowstride, NULL);
548 art_svp_free(svp);
549 break;
550 }
551 case GFX_TEXT: {
552 unsigned int n;
553 int error;
554 art_u8 fcolor[4],falpha;
555 FT_Face face;
556 gfx_char glyph;
557 gfx_string string;
558 FT_Vector vec; /* 26.6 */
560 float pen_x = 0.0 , pen_y = 0.0;
561 /* double x,y; */
562 long ix,iy;
564 fcolor[0] = node->color >> 24;
565 fcolor[1] = (node->color >> 16) & 0xff;
566 fcolor[2] = (node->color >> 8) & 0xff;
567 falpha = node->color & 0xff;
568 error = FT_New_Face( library,
569 (char *)node->filename,
570 0,
571 &face );
572 if ( error ) {
573 rrd_set_error("failed to load %s",node->filename);
574 break;
575 }
576 error = FT_Set_Char_Size(face, /* handle to face object */
577 (long)(node->size*64),
578 (long)(node->size*64),
579 (long)(100*canvas->zoom),
580 (long)(100*canvas->zoom));
581 if ( error ) break;
582 pen_x = node->x * canvas->zoom;
583 pen_y = node->y * canvas->zoom;
585 string = gfx_string_create (face, node->text, node->angle, node->tabwidth);
586 switch(node->halign){
587 case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
588 break;
589 case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
590 -string->bbox.xMax/2:-string->bbox.xMin/2;
591 break;
592 case GFX_H_LEFT: vec.x = -string->bbox.xMin;
593 break;
594 case GFX_H_NULL: vec.x = 0;
595 break;
596 }
598 switch(node->valign){
599 case GFX_V_TOP: vec.y = string->bbox.yMax;
600 break;
601 case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
602 string->bbox.yMax/2:string->bbox.yMin/2;
603 break;
604 case GFX_V_BOTTOM: vec.y = 0;
605 break;
606 case GFX_V_NULL: vec.y = 0;
607 break;
608 }
609 pen_x += vec.x/64;
610 pen_y += vec.y/64;
611 glyph = string->glyphs;
612 for(n=0; n<string->num_glyphs; ++n, ++glyph) {
613 int gr;
614 FT_Glyph image;
615 FT_BitmapGlyph bit;
616 /* long buf_x,comp_n; */
617 /* make copy to transform */
618 if (! glyph->image) {
619 fprintf (stderr, "no image\n");
620 continue;
621 }
622 error = FT_Glyph_Copy (glyph->image, &image);
623 if (error) {
624 fprintf (stderr, "couldn't copy image\n");
625 continue;
626 }
628 /* transform it */
629 vec = glyph->pos;
630 FT_Vector_Transform (&vec, &string->transform);
632 bit = (FT_BitmapGlyph) image;
633 gr = bit->bitmap.num_grays -1;
634 /*
635 buf_x = (pen_x + 0.5) + (double)bit->left;
636 comp_n = buf_x + bit->bitmap.width > pys_width ? pys_width - buf_x : bit->bitmap.width;
637 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
638 buf_x *= bytes_per_pixel ;
639 for (iy=0; iy < bit->bitmap.rows; iy++){
640 long buf_y = iy+(pen_y+0.5)-(double)bit->top;
641 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
642 buf_y *= rowstride;
643 for (ix=0;ix < bit->bitmap.width;ix++){
644 *(letter + (ix*bytes_per_pixel+3)) = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
645 }
646 art_rgba_rgba_composite(buffer + buf_y + buf_x ,letter,comp_n);
647 }
648 art_free(letter);
649 */
651 for (iy=0; iy < bit->bitmap.rows; iy++){
652 long buf_y = iy+(pen_y+0.5)-bit->top;
653 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
654 buf_y *= rowstride;
655 for (ix=0;ix < bit->bitmap.width;ix++){
656 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
657 art_u8 font_alpha;
659 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
660 buf_x *= bytes_per_pixel ;
661 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
662 if (font_alpha > 0){
663 fcolor[3] = (art_u8)((double)font_alpha / gr * falpha);
664 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
665 }
666 }
667 }
669 /*
670 for (iy=0; iy < bit->bitmap.rows; iy++){
671 long buf_y = iy+(pen_y+0.5)-bit->top;
672 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
673 buf_y *= rowstride;
674 for (ix=0;ix < bit->bitmap.width;ix++){
675 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
676 art_u8 font_alpha;
678 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
679 buf_x *= bytes_per_pixel ;
680 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
681 font_alpha = (art_u8)((double)font_alpha / gr * falpha);
682 for (iz = 0; iz < 3; iz++){
683 art_u8 *orig = buffer + buf_y + buf_x + iz;
684 *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) +
685 (double)fcolor[iz] / gr * (font_alpha));
686 }
687 }
688 }
689 */
690 FT_Done_Glyph (image);
691 }
692 gfx_string_destroy(string);
693 }
694 }
695 node = node->next;
696 }
697 gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel);
698 art_free(buffer);
699 FT_Done_FreeType( library );
700 return 0;
701 }
703 /* free memory used by nodes this will also remove memory required for
704 associated paths and svcs ... but not for text strings */
705 int
706 gfx_destroy (gfx_canvas_t *canvas){
707 gfx_node_t *next,*node = canvas->firstnode;
708 while(node){
709 next = node->next;
710 art_free(node->path);
711 free(node->text);
712 free(node->filename);
713 art_free(node);
714 node = next;
715 }
716 art_free(canvas);
717 return 0;
718 }
720 static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){
721 png_structp png_ptr = NULL;
722 png_infop info_ptr = NULL;
723 int i;
724 png_bytep *row_pointers;
725 int rowstride = width * bytes_per_pixel;
726 png_text text[2];
728 if (fp == NULL)
729 return (1);
731 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
732 if (png_ptr == NULL)
733 {
734 return (1);
735 }
736 row_pointers = (png_bytepp)png_malloc(png_ptr,
737 height*sizeof(png_bytep));
739 info_ptr = png_create_info_struct(png_ptr);
741 if (info_ptr == NULL)
742 {
743 png_free(png_ptr,row_pointers);
744 png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
745 return (1);
746 }
748 if (setjmp(png_jmpbuf(png_ptr)))
749 {
750 /* If we get here, we had a problem writing the file */
751 png_destroy_write_struct(&png_ptr, &info_ptr);
752 return (1);
753 }
755 png_init_io(png_ptr, fp);
756 png_set_IHDR (png_ptr, info_ptr,width, height,
757 8, PNG_COLOR_TYPE_RGB_ALPHA,
758 PNG_INTERLACE_NONE,
759 PNG_COMPRESSION_TYPE_DEFAULT,
760 PNG_FILTER_TYPE_DEFAULT);
762 text[0].key = "Software";
763 text[0].text = "RRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch";
764 text[0].compression = PNG_TEXT_COMPRESSION_NONE;
765 png_set_text (png_ptr, info_ptr, text, 1);
767 /* lets make this fast */
768 /* png_set_filter(png_ptr,0,PNG_FILTER_NONE); */
769 png_set_compression_level(png_ptr,1);
770 /* png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY); */
771 /*
772 png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_FILTER_SUB);
773 png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
774 png_set_compression_level(png_ptr,Z_BEST_SPEED); */
776 /* Write header data */
777 png_write_info (png_ptr, info_ptr);
778 for (i = 0; i < height; i++)
779 row_pointers[i] = (png_bytep) (buffer + i*rowstride);
781 png_write_image(png_ptr, row_pointers);
782 png_write_end(png_ptr, info_ptr);
783 png_free(png_ptr,row_pointers);
784 png_destroy_write_struct(&png_ptr, &info_ptr);
785 return 1;
786 }
789 /* ------- SVG -------
790 SVG reference:
791 http://www.w3.org/TR/SVG/
792 */
793 static int svg_indent = 0;
794 static int svg_single_line = 0;
795 static const char *svg_default_font = "Helvetica";
796 typedef struct svg_dash
797 {
798 int dash_enable;
799 double dash_adjust, dash_len, dash_offset;
800 double adjusted_on, adjusted_off;
801 } svg_dash;
804 static void svg_print_indent(FILE *fp)
805 {
806 int i;
807 for (i = svg_indent - svg_single_line; i > 0; i--) {
808 putc(' ', fp);
809 putc(' ', fp);
810 }
811 }
813 static void svg_start_tag(FILE *fp, const char *name)
814 {
815 svg_print_indent(fp);
816 putc('<', fp);
817 fputs(name, fp);
818 svg_indent++;
819 }
821 static void svg_close_tag_single_line(FILE *fp)
822 {
823 svg_single_line++;
824 putc('>', fp);
825 }
827 static void svg_close_tag(FILE *fp)
828 {
829 putc('>', fp);
830 if (!svg_single_line)
831 putc('\n', fp);
832 }
834 static void svg_end_tag(FILE *fp, const char *name)
835 {
836 /* name is NULL if closing empty-node tag */
837 svg_indent--;
838 if (svg_single_line)
839 svg_single_line--;
840 else if (name)
841 svg_print_indent(fp);
842 if (name != NULL) {
843 fputs("</", fp);
844 fputs(name, fp);
845 } else {
846 putc('/', fp);
847 }
848 svg_close_tag(fp);
849 }
851 static void svg_close_tag_empty_node(FILE *fp)
852 {
853 svg_end_tag(fp, NULL);
854 }
856 static void svg_write_text(FILE *fp, const char *text)
857 {
858 const unsigned char *p, *start, *last;
859 unsigned int ch;
860 p = (const unsigned char*)text;
861 if (!p)
862 return;
863 /* trim leading spaces */
864 while (*p == ' ')
865 p++;
866 start = p;
867 /* trim trailing spaces */
868 last = p - 1;
869 while ((ch = *p) != 0) {
870 if (ch != ' ')
871 last = p;
872 p++;
873 }
874 /* encode trimmed text */
875 p = start;
876 while (p <= last) {
877 ch = *p++;
878 ch = afm_host2unicode(ch); /* unsafe macro */
879 switch (ch) {
880 case '&': fputs("&", fp); break;
881 case '<': fputs("<", fp); break;
882 case '>': fputs(">", fp); break;
883 case '"': fputs(""", fp); break;
884 default:
885 if (ch >= 127)
886 fprintf(fp, "&#%d;", ch);
887 else
888 putc(ch, fp);
889 }
890 }
891 }
893 static void svg_format_number(char *buf, int bufsize, double d)
894 {
895 /* omit decimals if integer to reduce filesize */
896 char *p;
897 snprintf(buf, bufsize, "%.2f", d);
898 p = buf; /* doesn't trust snprintf return value */
899 while (*p)
900 p++;
901 while (--p > buf) {
902 char ch = *p;
903 if (ch == '0') {
904 *p = '\0'; /* zap trailing zeros */
905 continue;
906 }
907 if (ch == '.')
908 *p = '\0'; /* zap trailing dot */
909 break;
910 }
911 }
913 static void svg_write_number(FILE *fp, double d)
914 {
915 char buf[60];
916 svg_format_number(buf, sizeof(buf), d);
917 fputs(buf, fp);
918 }
920 static int svg_color_is_black(int c)
921 {
922 /* gfx_color_t is RRGGBBAA */
923 return c == 0x000000FF;
924 }
926 static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
927 {
928 /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
929 gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
930 gfx_color_t opacity = c & 0xFF;
931 fprintf(fp, " %s=\"", attr);
932 if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
933 /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
934 fprintf(fp, "#%03lX",
935 ( ((rrggbb >> 8) & 0xF00)
936 | ((rrggbb >> 4) & 0x0F0)
937 | ( rrggbb & 0x00F)));
938 } else {
939 fprintf(fp, "#%06lX", rrggbb);
940 }
941 fputs("\"", fp);
942 if (opacity != 0xFF) {
943 fprintf(fp, " stroke-opacity=\"");
944 svg_write_number(fp, opacity / 255.0);
945 fputs("\"", fp);
946 }
947 }
949 static void svg_get_dash(gfx_node_t *node, svg_dash *d)
950 {
951 double offset;
952 int mult;
953 if (node->dash_on <= 0 || node->dash_off <= 0) {
954 d->dash_enable = 0;
955 return;
956 }
957 d->dash_enable = 1;
958 d->dash_len = node->dash_on + node->dash_off;
959 /* dash on/off adjustment due to round caps */
960 d->dash_adjust = 0.8 * node->size;
961 d->adjusted_on = node->dash_on - d->dash_adjust;
962 if (d->adjusted_on < 0.01)
963 d->adjusted_on = 0.01;
964 d->adjusted_off = d->dash_len - d->adjusted_on;
965 /* dash offset calc */
966 if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
967 offset = node->path[0].y;
968 else
969 offset = node->path[0].x;
970 mult = (int)fabs(offset / d->dash_len);
971 d->dash_offset = offset - mult * d->dash_len;
972 if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
973 d->dash_offset = d->dash_len - d->dash_offset;
974 }
976 static int svg_dash_equal(svg_dash *a, svg_dash *b)
977 {
978 if (a->dash_enable != b->dash_enable)
979 return 0;
980 if (a->adjusted_on != b->adjusted_on)
981 return 0;
982 if (a->adjusted_off != b->adjusted_off)
983 return 0;
984 /* rest of properties will be the same when on+off are */
985 return 1;
986 }
988 static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
989 {
990 svg_dash dash_info;
991 svg_get_dash(node, &dash_info);
992 fputs(" stroke-width=\"", fp);
993 svg_write_number(fp, node->size);
994 fputs("\"", fp);
995 svg_write_color(fp, node->color, "stroke");
996 fputs(" fill=\"none\"", fp);
997 if (dash_info.dash_enable) {
998 if (dash_info.dash_offset != 0) {
999 fputs(" stroke-dashoffset=\"", fp);
1000 svg_write_number(fp, dash_info.dash_offset);
1001 fputs("\"", fp);
1002 }
1003 fputs(" stroke-dasharray=\"", fp);
1004 svg_write_number(fp, dash_info.adjusted_on);
1005 fputs(",", fp);
1006 svg_write_number(fp, dash_info.adjusted_off);
1007 fputs("\"", fp);
1008 }
1009 }
1011 static int svg_is_int_step(double a, double b)
1012 {
1013 double diff = fabs(a - b);
1014 return floor(diff) == diff;
1015 }
1017 static int svg_path_straight_segment(FILE *fp,
1018 double lastA, double currentA, double currentB,
1019 gfx_node_t *node,
1020 int segment_idx, int isx, char absChar, char relChar)
1021 {
1022 if (!svg_is_int_step(lastA, currentA)) {
1023 putc(absChar, fp);
1024 svg_write_number(fp, currentA);
1025 return 0;
1026 }
1027 if (segment_idx < node->points - 1) {
1028 ArtVpath *vec = node->path + segment_idx + 1;
1029 if (vec->code == ART_LINETO) {
1030 double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
1031 double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
1032 if (nextB == currentB
1033 && ((currentA >= lastA) == (nextA >= currentA))
1034 && svg_is_int_step(currentA, nextA)) {
1035 return 1; /* skip to next as it is a straight line */
1036 }
1037 }
1038 }
1039 putc(relChar, fp);
1040 svg_write_number(fp, currentA - lastA);
1041 return 0;
1042 }
1044 static void svg_path(FILE *fp, gfx_node_t *node, int multi)
1045 {
1046 int i;
1047 double lastX = 0, lastY = 0;
1048 /* for straight lines <path..> tags take less space than
1049 <line..> tags because of the efficient packing
1050 in the 'd' attribute */
1051 svg_start_tag(fp, "path");
1052 if (!multi)
1053 svg_common_path_attributes(fp, node);
1054 fputs(" d=\"", fp);
1055 /* specification of the 'd' attribute: */
1056 /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
1057 for (i = 0; i < node->points; i++) {
1058 ArtVpath *vec = node->path + i;
1059 double x = vec->x - LINEOFFSET;
1060 double y = vec->y - LINEOFFSET;
1061 switch (vec->code) {
1062 case ART_MOVETO_OPEN: /* fall-through */
1063 case ART_MOVETO:
1064 putc('M', fp);
1065 svg_write_number(fp, x);
1066 putc(',', fp);
1067 svg_write_number(fp, y);
1068 break;
1069 case ART_LINETO:
1070 /* try optimize filesize by using minimal lineto commands */
1071 /* without introducing rounding errors. */
1072 if (x == lastX) {
1073 if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
1074 continue;
1075 } else if (y == lastY) {
1076 if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
1077 continue;
1078 } else {
1079 putc('L', fp);
1080 svg_write_number(fp, x);
1081 putc(',', fp);
1082 svg_write_number(fp, y);
1083 }
1084 break;
1085 case ART_CURVETO: break; /* unsupported */
1086 case ART_END: break; /* nop */
1087 }
1088 lastX = x;
1089 lastY = y;
1090 }
1091 if (node->closed_path)
1092 fputs(" Z", fp);
1093 fputs("\"", fp);
1094 svg_close_tag_empty_node(fp);
1095 }
1097 static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
1098 {
1099 /* optimize for multiple paths with the same color, penwidth, etc. */
1100 int num = 1;
1101 gfx_node_t *node = *nodeR;
1102 gfx_node_t *next = node->next;
1103 while (next) {
1104 if (next->type != node->type
1105 || next->size != node->size
1106 || next->color != node->color
1107 || next->dash_on != node->dash_on
1108 || next->dash_off != node->dash_off)
1109 break;
1110 next = next->next;
1111 num++;
1112 }
1113 if (num == 1) {
1114 svg_path(fp, node, 0);
1115 return;
1116 }
1117 svg_start_tag(fp, "g");
1118 svg_common_path_attributes(fp, node);
1119 svg_close_tag(fp);
1120 while (num && node) {
1121 svg_path(fp, node, 1);
1122 if (!--num)
1123 break;
1124 node = node->next;
1125 *nodeR = node;
1126 }
1127 svg_end_tag(fp, "g");
1128 }
1130 static void svg_area(FILE *fp, gfx_node_t *node)
1131 {
1132 int i;
1133 double startX = 0, startY = 0;
1134 svg_start_tag(fp, "polygon");
1135 fputs(" ", fp);
1136 svg_write_color(fp, node->color, "fill");
1137 fputs(" points=\"", fp);
1138 for (i = 0; i < node->points; i++) {
1139 ArtVpath *vec = node->path + i;
1140 double x = vec->x - LINEOFFSET;
1141 double y = vec->y - LINEOFFSET;
1142 switch (vec->code) {
1143 case ART_MOVETO_OPEN: /* fall-through */
1144 case ART_MOVETO:
1145 svg_write_number(fp, x);
1146 putc(',', fp);
1147 svg_write_number(fp, y);
1148 startX = x;
1149 startY = y;
1150 break;
1151 case ART_LINETO:
1152 if (i == node->points - 2
1153 && node->path[i + 1].code == ART_END
1154 && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
1155 break; /* poly area always closed, no need for last point */
1156 }
1157 putc(' ', fp);
1158 svg_write_number(fp, x);
1159 putc(',', fp);
1160 svg_write_number(fp, y);
1161 break;
1162 case ART_CURVETO: break; /* unsupported */
1163 case ART_END: break; /* nop */
1164 }
1165 }
1166 fputs("\"", fp);
1167 svg_close_tag_empty_node(fp);
1168 }
1170 static void svg_text(FILE *fp, gfx_node_t *node)
1171 {
1172 double x = node->x - LINEOFFSET;
1173 double y = node->y - LINEOFFSET;
1174 if (node->angle != 0) {
1175 svg_start_tag(fp, "g");
1176 fputs(" transform=\"translate(", fp);
1177 svg_write_number(fp, x);
1178 fputs(",", fp);
1179 svg_write_number(fp, y);
1180 fputs(") rotate(", fp);
1181 svg_write_number(fp, node->angle);
1182 fputs(")\"", fp);
1183 x = y = 0;
1184 svg_close_tag(fp);
1185 }
1186 switch (node->valign) {
1187 case GFX_V_TOP: y += node->size; break;
1188 case GFX_V_CENTER: y += node->size / 3; break;
1189 case GFX_V_BOTTOM: break;
1190 case GFX_V_NULL: break;
1191 }
1192 svg_start_tag(fp, "text");
1193 fputs(" x=\"", fp);
1194 svg_write_number(fp, x);
1195 fputs("\" y=\"", fp);
1196 svg_write_number(fp, y);
1198 /* if (strcmp(node->filename, svg_default_font))
1199 fprintf(fp, " font-family=\"%s\"", node->filename);
1200 */
1201 fputs("\" font-family=\"Helvetica", fp);
1202 fputs("\" font-size=\"", fp);
1203 svg_write_number(fp, node->size);
1204 fputs("\"", fp);
1205 if (!svg_color_is_black(node->color))
1206 svg_write_color(fp, node->color, "fill");
1207 switch (node->halign) {
1208 case GFX_H_RIGHT: fputs(" text-anchor=\"end\"", fp); break;
1209 case GFX_H_CENTER: fputs(" text-anchor=\"middle\"", fp); break;
1210 case GFX_H_LEFT: break;
1211 case GFX_H_NULL: break;
1212 }
1213 svg_close_tag_single_line(fp);
1214 /* support for node->tabwidth missing */
1215 svg_write_text(fp, node->text);
1216 svg_end_tag(fp, "text");
1217 if (node->angle != 0)
1218 svg_end_tag(fp, "g");
1219 }
1221 int gfx_render_svg (gfx_canvas_t *canvas,
1222 art_u32 width, art_u32 height,
1223 gfx_color_t background, FILE *fp){
1224 gfx_node_t *node = canvas->firstnode;
1225 fputs(
1226 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
1227 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
1228 " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
1229 "<!--\n"
1230 " SVG file created by RRDtool,\n"
1231 " Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch\n"
1232 "\n"
1233 " The width/height attributes in the outhermost svg node\n"
1234 " are just default sizes for the browser which is used\n"
1235 " if the svg file is openened directly without being\n"
1236 " embedded in an html file.\n"
1237 " The viewBox is the local coord system for rrdtool.\n"
1238 "-->\n", fp);
1239 svg_start_tag(fp, "svg");
1240 fputs(" width=\"", fp);
1241 svg_write_number(fp, width * canvas->zoom);
1242 fputs("\" height=\"", fp);
1243 svg_write_number(fp, height * canvas->zoom);
1244 fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
1245 svg_write_number(fp, -LINEOFFSET);
1246 fputs(" ", fp);
1247 svg_write_number(fp, -LINEOFFSET);
1248 fputs(" ", fp);
1249 svg_write_number(fp, width - LINEOFFSET);
1250 fputs(" ", fp);
1251 svg_write_number(fp, height - LINEOFFSET);
1252 fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
1253 fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
1254 fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
1255 svg_close_tag(fp);
1256 svg_start_tag(fp, "rect");
1257 fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
1258 svg_write_color(fp, background, "fill");
1259 svg_close_tag_empty_node(fp);
1260 while (node) {
1261 switch (node->type) {
1262 case GFX_LINE:
1263 svg_multi_path(fp, &node);
1264 break;
1265 case GFX_AREA:
1266 svg_area(fp, node);
1267 break;
1268 case GFX_TEXT:
1269 svg_text(fp, node);
1270 }
1271 node = node->next;
1272 }
1273 svg_end_tag(fp, "svg");
1274 return 0;
1275 }
1277 /* ------- EPS -------
1278 EPS and Postscript references:
1279 http://partners.adobe.com/asn/developer/technotes/postscript.html
1280 */
1282 typedef struct eps_font
1283 {
1284 const char *ps_font;
1285 int id;
1286 struct eps_font *next;
1287 } eps_font;
1289 typedef struct eps_state
1290 {
1291 FILE *fp;
1292 gfx_canvas_t *canvas;
1293 art_u32 page_width, page_height;
1294 eps_font *font_list;
1295 /*--*/
1296 gfx_color_t color;
1297 const char *font;
1298 double font_size;
1299 double line_width;
1300 int linecap, linejoin;
1301 int has_dash;
1302 } eps_state;
1304 static void eps_set_color(eps_state *state, gfx_color_t color)
1305 {
1306 /* gfx_color_t is RRGGBBAA */
1307 if (state->color == color)
1308 return;
1309 fprintf(state->fp, "%d %d %d Rgb\n",
1310 (int)((color >> 24) & 255),
1311 (int)((color >> 16) & 255),
1312 (int)((color >> 8) & 255));
1313 state->color = color;
1314 }
1316 static int eps_add_font(eps_state *state, gfx_node_t *node)
1317 {
1318 /* The fonts list could be postponed to the end using
1319 (atend), but let's be nice and have them in the header. */
1320 const char *ps_font = afm_get_font_postscript_name(node->filename);
1321 eps_font *ef;
1322 for (ef = state->font_list; ef; ef = ef->next) {
1323 if (!strcmp(ps_font, ef->ps_font))
1324 return 0;
1325 }
1326 ef = malloc(sizeof(eps_font));
1327 if (ef == NULL) {
1328 rrd_set_error("malloc for eps_font");
1329 return -1;
1330 }
1331 ef->next = state->font_list;
1332 ef->ps_font = ps_font;
1333 state->font_list = ef;
1334 return 0;
1335 }
1337 static void eps_list_fonts(eps_state *state, const char *dscName)
1338 {
1339 eps_font *ef;
1340 int lineLen = strlen(dscName);
1341 if (!state->font_list)
1342 return;
1343 fputs(dscName, state->fp);
1344 for (ef = state->font_list; ef; ef = ef->next) {
1345 int nameLen = strlen(ef->ps_font);
1346 if (lineLen + nameLen > 100 && lineLen) {
1347 fputs("\n", state->fp);
1348 fputs("%%- \n", state->fp);
1349 lineLen = 5;
1350 } else {
1351 fputs(" ", state->fp);
1352 lineLen++;
1353 }
1354 fputs(ef->ps_font, state->fp);
1355 lineLen += nameLen;
1356 }
1357 fputs("\n", state->fp);
1358 }
1360 static void eps_define_fonts(eps_state *state)
1361 {
1362 eps_font *ef;
1363 if (!state->font_list)
1364 return;
1365 for (ef = state->font_list; ef; ef = ef->next) {
1366 /* PostScript¨ LANGUAGE REFERENCE third edition
1367 page 349 */
1368 fprintf(state->fp,
1369 "%%\n"
1370 "/%s findfont dup length dict begin\n"
1371 "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
1372 "/Encoding ISOLatin1Encoding def\n"
1373 "currentdict end\n"
1374 "/%s-ISOLatin1 exch definefont pop\n"
1375 "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
1376 ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
1377 }
1378 }
1380 static int eps_prologue(eps_state *state)
1381 {
1382 gfx_node_t *node;
1383 fputs(
1384 "%!PS-Adobe-3.0 EPSF-3.0\n"
1385 "%%Creator: RRDtool 1.2.0 Tobias Oetiker, http://tobi.oetiker.ch\n"
1386 /* can't like weird chars here */
1387 "%%Title: (RRDtool output)\n"
1388 "%%DocumentData: Clean7Bit\n"
1389 "", state->fp);
1390 fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
1391 state->page_width, state->page_height);
1392 for (node = state->canvas->firstnode; node; node = node->next) {
1393 if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
1394 return -1;
1395 }
1396 eps_list_fonts(state, "%%DocumentFonts:");
1397 eps_list_fonts(state, "%%DocumentNeededFonts:");
1398 fputs(
1399 "%%EndComments\n"
1400 "%%BeginProlog\n"
1401 "%%EndProlog\n" /* must have, or BoundingBox is ignored */
1402 "/bd { bind def } bind def\n"
1403 "", state->fp);
1404 fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
1405 fputs(
1406 "/X2 {X exch X exch} bd\n"
1407 "/M {X2 moveto} bd\n"
1408 "/L {X2 lineto} bd\n"
1409 "/m {moveto} bd\n"
1410 "/l {lineto} bd\n"
1411 "/S {stroke} bd\n"
1412 "/CP {closepath} bd\n"
1413 "/WS {setlinewidth stroke} bd\n"
1414 "/F {fill} bd\n"
1415 "/TaL { } bd\n"
1416 "/TaC {dup stringwidth pop neg 2 div 0 rmoveto } bd\n"
1417 "/TaR {dup stringwidth pop neg 0 rmoveto } bd\n"
1418 "/TL {moveto TaL show} bd\n"
1419 "/TC {moveto TaC show} bd\n"
1420 "/TR {moveto TaR show} bd\n"
1421 "/Rgb { 255.0 div 3 1 roll\n"
1422 " 255.0 div 3 1 roll \n"
1423 " 255.0 div 3 1 roll setrgbcolor } bd\n"
1424 "", state->fp);
1425 eps_define_fonts(state);
1426 return 0;
1427 }
1429 static void eps_clear_dash(eps_state *state)
1430 {
1431 if (!state->has_dash)
1432 return;
1433 state->has_dash = 0;
1434 fputs("[1 0] 0 setdash\n", state->fp);
1435 }
1437 static void eps_write_linearea(eps_state *state, gfx_node_t *node)
1438 {
1439 int i;
1440 FILE *fp = state->fp;
1441 int useOffset = 0;
1442 int clearDashIfAny = 1;
1443 eps_set_color(state, node->color);
1444 if (node->type == GFX_LINE) {
1445 svg_dash dash_info;
1446 if (state->linecap != 1) {
1447 fputs("1 setlinecap\n", fp);
1448 state->linecap = 1;
1449 }
1450 if (state->linejoin != 1) {
1451 fputs("1 setlinejoin\n", fp);
1452 state->linejoin = 1;
1453 }
1454 svg_get_dash(node, &dash_info);
1455 if (dash_info.dash_enable) {
1456 clearDashIfAny = 0;
1457 state->has_dash = 1;
1458 fputs("[", fp);
1459 svg_write_number(fp, dash_info.adjusted_on);
1460 fputs(" ", fp);
1461 svg_write_number(fp, dash_info.adjusted_off);
1462 fputs("] ", fp);
1463 svg_write_number(fp, dash_info.dash_offset);
1464 fputs(" setdash\n", fp);
1465 }
1466 }
1467 if (clearDashIfAny)
1468 eps_clear_dash(state);
1469 for (i = 0; i < node->points; i++) {
1470 ArtVpath *vec = node->path + i;
1471 double x = vec->x;
1472 double y = state->page_height - vec->y;
1473 if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
1474 useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
1475 if (useOffset) {
1476 x -= LINEOFFSET;
1477 y -= LINEOFFSET;
1478 }
1479 switch (vec->code) {
1480 case ART_MOVETO_OPEN: /* fall-through */
1481 case ART_MOVETO:
1482 svg_write_number(fp, x);
1483 fputc(' ', fp);
1484 svg_write_number(fp, y);
1485 fputc(' ', fp);
1486 fputs(useOffset ? "M\n" : "m\n", fp);
1487 break;
1488 case ART_LINETO:
1489 svg_write_number(fp, x);
1490 fputc(' ', fp);
1491 svg_write_number(fp, y);
1492 fputc(' ', fp);
1493 fputs(useOffset ? "L\n" : "l\n", fp);
1494 break;
1495 case ART_CURVETO: break; /* unsupported */
1496 case ART_END: break; /* nop */
1497 }
1498 }
1499 if (node->type == GFX_LINE) {
1500 if (node->closed_path)
1501 fputs("CP ", fp);
1502 if (node->size != state->line_width) {
1503 state->line_width = node->size;
1504 svg_write_number(fp, state->line_width);
1505 fputs(" WS\n", fp);
1506 } else {
1507 fputs("S\n", fp);
1508 }
1509 } else {
1510 fputs("F\n", fp);
1511 }
1512 }
1514 static void eps_write_text(eps_state *state, gfx_node_t *node)
1515 {
1516 FILE *fp = state->fp;
1517 const unsigned char *p;
1518 const char *ps_font = afm_get_font_postscript_name(node->filename);
1519 char align = 'L';
1520 double x = node->x;
1521 double y = state->page_height - node->y, ydelta = 0;
1522 int lineLen = 0;
1523 eps_set_color(state, node->color);
1524 if (strcmp(ps_font, state->font) || node->size != state->font_size) {
1525 state->font = ps_font;
1526 state->font_size = node->size;
1527 svg_write_number(fp, state->font_size);
1528 fprintf(fp, " SetFont-%s\n", state->font);
1529 }
1530 fputs("(", fp);
1531 lineLen = 20;
1532 for (p = (const unsigned char*)node->text; *p; p++) {
1533 if (lineLen > 70) {
1534 fputs("\\\n", fp); /* backslash and \n */
1535 lineLen = 0;
1536 }
1537 switch (*p) {
1538 case '(':
1539 case ')':
1540 case '\\':
1541 case '\n':
1542 case '\r':
1543 case '\t':
1544 fputc('\\', fp);
1545 lineLen++;
1546 /* fall-through */
1547 default:
1548 if (*p >= 126)
1549 fprintf(fp, "\\%03o", *p);
1550 else
1551 fputc(*p, fp);
1552 lineLen++;
1553 }
1554 }
1555 fputs(") ", fp);
1556 switch(node->valign){
1557 case GFX_V_TOP: ydelta = -node->size; break;
1558 case GFX_V_CENTER: ydelta = -node->size / 3.0; break;
1559 case GFX_V_BOTTOM: break;
1560 case GFX_V_NULL: break;
1561 }
1562 if (node->angle == 0)
1563 y += ydelta;
1564 switch (node->halign) {
1565 case GFX_H_RIGHT: align = 'R'; break;
1566 case GFX_H_CENTER: align = 'C'; break;
1567 case GFX_H_LEFT: align= 'L'; break;
1568 case GFX_H_NULL: align= 'L'; break;
1569 }
1570 if (node->angle != 0) {
1571 fputs("\n", fp);
1572 fputs(" gsave ", fp);
1573 svg_write_number(fp, x);
1574 fputc(' ', fp);
1575 svg_write_number(fp, y);
1576 fputs(" translate ", fp);
1577 svg_write_number(fp, -node->angle);
1578 fputs(" rotate 0 ", fp);
1579 svg_write_number(fp, ydelta);
1580 fputs(" moveto ", fp);
1581 fprintf(fp, "Ta%c", align);
1582 fputs(" show grestore\n", fp);
1583 } else {
1584 svg_write_number(fp, x);
1585 fputc(' ', fp);
1586 svg_write_number(fp, y);
1587 fputs(" T", fp);
1588 fputc(align, fp);
1589 fputc('\n', fp);
1590 }
1591 }
1593 static int eps_write_content(eps_state *state)
1594 {
1595 gfx_node_t *node;
1596 fputs("%\n", state->fp);
1597 for (node = state->canvas->firstnode; node; node = node->next) {
1598 switch (node->type) {
1599 case GFX_LINE:
1600 case GFX_AREA:
1601 eps_write_linearea(state, node);
1602 break;
1603 case GFX_TEXT:
1604 eps_write_text(state, node);
1605 break;
1606 }
1607 }
1608 return 0;
1609 }
1611 int gfx_render_eps (gfx_canvas_t *canvas,
1612 art_u32 width, art_u32 height,
1613 gfx_color_t background, FILE *fp){
1614 struct eps_state state;
1615 state.fp = fp;
1616 state.canvas = canvas;
1617 state.page_width = width;
1618 state.page_height = height;
1619 state.font = "no-default-font";
1620 state.font_size = -1;
1621 state.color = 0; /* black */
1622 state.font_list = NULL;
1623 state.linecap = -1;
1624 state.linejoin = -1;
1625 state.has_dash = 0;
1626 if (eps_prologue(&state) == -1)
1627 return -1;
1628 eps_set_color(&state, background);
1629 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
1630 height, width, height, width);
1631 if (eps_write_content(&state) == -1)
1632 return 0;
1633 fputs("showpage\n", fp);
1634 fputs("%%EOF\n", fp);
1635 while (state.font_list) {
1636 eps_font *next = state.font_list->next;
1637 free(state.font_list);
1638 state.font_list = next;
1639 }
1640 return 0;
1641 }
1643 /* ------- PDF -------
1644 PDF references page:
1645 http://partners.adobe.com/asn/developer/technotes/acrobatpdf.html
1646 */
1648 typedef struct pdf_buffer
1649 {
1650 int id, is_obj, is_dict, is_stream, pdf_file_pos;
1651 char *data;
1652 int alloc_size, current_size;
1653 struct pdf_buffer *previous_buffer, *next_buffer;
1654 struct pdf_state *state;
1655 } pdf_buffer;
1657 typedef struct pdf_font
1658 {
1659 const char *ps_font;
1660 pdf_buffer obj;
1661 struct pdf_font *next;
1662 } pdf_font;
1664 typedef struct pdf_state
1665 {
1666 FILE *fp;
1667 gfx_canvas_t *canvas;
1668 art_u32 page_width, page_height;
1669 pdf_font *font_list;
1670 pdf_buffer *first_buffer, *last_buffer;
1671 int pdf_file_pos;
1672 int has_failed;
1673 /*--*/
1674 gfx_color_t stroke_color, fill_color;
1675 int font_id;
1676 double font_size;
1677 double line_width;
1678 svg_dash dash;
1679 int linecap, linejoin;
1680 int last_obj_id;
1681 /*--*/
1682 pdf_buffer pdf_header;
1683 pdf_buffer catalog_obj, pages_obj, page1_obj;
1684 pdf_buffer fontsdict_obj;
1685 pdf_buffer graph_stream;
1686 } pdf_state;
1688 static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
1689 {
1690 int initial_size = 32;
1691 buf->state = state;
1692 buf->id = -42;
1693 buf->alloc_size = 0;
1694 buf->current_size = 0;
1695 buf->data = (char*)malloc(initial_size);
1696 buf->is_obj = 0;
1697 buf->previous_buffer = NULL;
1698 buf->next_buffer = NULL;
1699 if (buf->data == NULL) {
1700 rrd_set_error("malloc for pdf_buffer data");
1701 state->has_failed = 1;
1702 return;
1703 }
1704 buf->alloc_size = initial_size;
1705 if (state->last_buffer)
1706 state->last_buffer->next_buffer = buf;
1707 if (state->first_buffer == NULL)
1708 state->first_buffer = buf;
1709 buf->previous_buffer = state->last_buffer;
1710 state->last_buffer = buf;
1711 }
1713 static void pdf_put(pdf_buffer *buf, const char *text, int len)
1714 {
1715 if (len <= 0)
1716 return;
1717 if (buf->alloc_size < buf->current_size + len) {
1718 int new_size = buf->alloc_size;
1719 char *new_buf;
1720 while (new_size < buf->current_size + len)
1721 new_size *= 4;
1722 new_buf = (char*)malloc(new_size);
1723 if (new_buf == NULL) {
1724 rrd_set_error("re-malloc for pdf_buffer data");
1725 buf->state->has_failed = 1;
1726 return;
1727 }
1728 memcpy(new_buf, buf->data, buf->current_size);
1729 free(buf->data);
1730 buf->data = new_buf;
1731 buf->alloc_size = new_size;
1732 }
1733 memcpy(buf->data + buf->current_size, text, len);
1734 buf->current_size += len;
1735 }
1737 static void pdf_puts(pdf_buffer *buf, const char *text)
1738 {
1739 pdf_put(buf, text, strlen(text));
1740 }
1742 static void pdf_indent(pdf_buffer *buf)
1743 {
1744 pdf_puts(buf, "\t");
1745 }
1747 static void pdf_putsi(pdf_buffer *buf, const char *text)
1748 {
1749 pdf_indent(buf);
1750 pdf_puts(buf, text);
1751 }
1753 static void pdf_putint(pdf_buffer *buf, int i)
1754 {
1755 char tmp[20];
1756 sprintf(tmp, "%d", i);
1757 pdf_puts(buf, tmp);
1758 }
1760 static void pdf_putnumber(pdf_buffer *buf, double d)
1761 {
1762 char tmp[50];
1763 svg_format_number(tmp, sizeof(tmp), d);
1764 pdf_puts(buf, tmp);
1765 }
1767 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
1768 {
1769 pdf_init_buffer(state, buf);
1770 buf->id = ++state->last_obj_id;
1771 buf->is_obj = 1;
1772 buf->is_stream = 0;
1773 }
1775 static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
1776 {
1777 pdf_init_object(state, buf);
1778 buf->is_dict = 1;
1779 }
1781 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
1782 gfx_color_t *current_color, const char *op)
1783 {
1784 /* gfx_color_t is RRGGBBAA */
1785 if (*current_color == color)
1786 return;
1787 pdf_putnumber(buf, ((color >> 24) & 255) / 255.0);
1788 pdf_puts(buf, " ");
1789 pdf_putnumber(buf, ((color >> 16) & 255) / 255.0);
1790 pdf_puts(buf, " ");
1791 pdf_putnumber(buf, ((color >> 8) & 255) / 255.0);
1792 pdf_puts(buf, " ");
1793 pdf_puts(buf, op);
1794 pdf_puts(buf, "\n");
1795 *current_color = color;
1796 }
1798 static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
1799 {
1800 pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
1801 }
1803 static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
1804 {
1805 pdf_set_color(buf, color, &buf->state->fill_color, "rg");
1806 }
1808 static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
1809 {
1810 const char *ps_font = afm_get_font_postscript_name(node->filename);
1811 pdf_font *ef;
1812 for (ef = state->font_list; ef; ef = ef->next) {
1813 if (!strcmp(ps_font, ef->ps_font))
1814 return ef;
1815 }
1816 return NULL;
1817 }
1819 static void pdf_add_font(pdf_state *state, gfx_node_t *node)
1820 {
1821 pdf_font *ef = pdf_find_font(state, node);
1822 if (ef)
1823 return;
1824 ef = malloc(sizeof(pdf_font));
1825 if (ef == NULL) {
1826 rrd_set_error("malloc for pdf_font");
1827 state->has_failed = 1;
1828 return;
1829 }
1830 pdf_init_dict(state, &ef->obj);
1831 ef->next = state->font_list;
1832 ef->ps_font = afm_get_font_postscript_name(node->filename);
1833 state->font_list = ef;
1834 /* fonts dict */
1835 pdf_putsi(&state->fontsdict_obj, "/F");
1836 pdf_putint(&state->fontsdict_obj, ef->obj.id);
1837 pdf_puts(&state->fontsdict_obj, " ");
1838 pdf_putint(&state->fontsdict_obj, ef->obj.id);
1839 pdf_puts(&state->fontsdict_obj, " 0 R\n");
1840 /* fonts def */
1841 pdf_putsi(&ef->obj, "/Type /Font\n");
1842 pdf_putsi(&ef->obj, "/Subtype /Type1\n");
1843 pdf_putsi(&ef->obj, "/Name /F");
1844 pdf_putint(&ef->obj, ef->obj.id);
1845 pdf_puts(&ef->obj, "\n");
1846 pdf_putsi(&ef->obj, "/BaseFont /");
1847 pdf_puts(&ef->obj, ef->ps_font);
1848 pdf_puts(&ef->obj, "\n");
1849 pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
1850 /* 'Cp1252' (this is latin 1 extended with 27 characters;
1851 the encoding is also known as 'winansi')
1852 http://www.lowagie.com/iText/tutorial/ch09.html */
1853 }
1855 static void pdf_create_fonts(pdf_state *state)
1856 {
1857 gfx_node_t *node;
1858 for (node = state->canvas->firstnode; node; node = node->next) {
1859 if (node->type == GFX_TEXT)
1860 pdf_add_font(state, node);
1861 }
1862 }
1864 static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
1865 {
1866 int i;
1867 pdf_buffer *s = &state->graph_stream;
1868 if (node->type == GFX_LINE) {
1869 svg_dash dash_info;
1870 svg_get_dash(node, &dash_info);
1871 if (!svg_dash_equal(&dash_info, &state->dash)) {
1872 state->dash = dash_info;
1873 if (dash_info.dash_enable) {
1874 pdf_puts(s, "[");
1875 pdf_putnumber(s, dash_info.adjusted_on);
1876 pdf_puts(s, " ");
1877 pdf_putnumber(s, dash_info.adjusted_off);
1878 pdf_puts(s, "] ");
1879 pdf_putnumber(s, dash_info.dash_offset);
1880 pdf_puts(s, " d\n");
1881 } else {
1882 pdf_puts(s, "[] 0 d\n");
1883 }
1884 }
1885 pdf_set_stroke_color(s, node->color);
1886 if (state->linecap != 1) {
1887 pdf_puts(s, "1 j\n");
1888 state->linecap = 1;
1889 }
1890 if (state->linejoin != 1) {
1891 pdf_puts(s, "1 J\n");
1892 state->linejoin = 1;
1893 }
1894 if (node->size != state->line_width) {
1895 state->line_width = node->size;
1896 pdf_putnumber(s, state->line_width);
1897 pdf_puts(s, " w\n");
1898 }
1899 } else {
1900 pdf_set_fill_color(s, node->color);
1901 }
1902 for (i = 0; i < node->points; i++) {
1903 ArtVpath *vec = node->path + i;
1904 double x = vec->x;
1905 double y = state->page_height - vec->y;
1906 if (node->type == GFX_AREA) {
1907 x += LINEOFFSET; /* adjust for libart handling of areas */
1908 y -= LINEOFFSET;
1909 }
1910 switch (vec->code) {
1911 case ART_MOVETO_OPEN: /* fall-through */
1912 case ART_MOVETO:
1913 pdf_putnumber(s, x);
1914 pdf_puts(s, " ");
1915 pdf_putnumber(s, y);
1916 pdf_puts(s, " m\n");
1917 break;
1918 case ART_LINETO:
1919 pdf_putnumber(s, x);
1920 pdf_puts(s, " ");
1921 pdf_putnumber(s, y);
1922 pdf_puts(s, " l\n");
1923 break;
1924 case ART_CURVETO: break; /* unsupported */
1925 case ART_END: break; /* nop */
1926 }
1927 }
1928 if (node->type == GFX_LINE) {
1929 pdf_puts(s, node->closed_path ? "s\n" : "S\n");
1930 } else {
1931 pdf_puts(s, "f\n");
1932 }
1933 }
1935 static void pdf_write_text(pdf_state *state, gfx_node_t *node,
1936 int last_was_text, int next_is_text)
1937 {
1938 char tmp[30];
1939 pdf_buffer *s = &state->graph_stream;
1940 const unsigned char *p;
1941 pdf_font *font = pdf_find_font(state, node);
1942 double x = node->x;
1943 double y = state->page_height - node->y;
1944 double dx = 0, dy = 0;
1945 double cos_a = 0, sin_a = 0;
1946 if (font == NULL) {
1947 rrd_set_error("font disappeared");
1948 state->has_failed = 1;
1949 return;
1950 }
1951 switch(node->valign){
1952 case GFX_V_TOP: dy = -node->size; break;
1953 case GFX_V_CENTER: dy = -node->size / 3.0; break;
1954 case GFX_V_BOTTOM: break;
1955 case GFX_V_NULL: break;
1956 }
1957 switch (node->halign) {
1958 case GFX_H_RIGHT: dx = -afm_get_text_width(0, font->ps_font,
1959 node->size, node->tabwidth, node->text);
1960 break;
1961 case GFX_H_CENTER: dx = -afm_get_text_width(0, font->ps_font,
1962 node->size, node->tabwidth, node->text) / 2;
1963 break;
1964 case GFX_H_LEFT: break;
1965 case GFX_H_NULL: break;
1966 }
1967 pdf_set_fill_color(s, node->color);
1968 if (node->angle != 0) {
1969 double a = 2 * M_PI * -node->angle / 360.0;
1970 double new_x, new_y;
1971 cos_a = cos(a);
1972 sin_a = sin(a);
1973 new_x = cos_a * dx - sin_a * dy + x;
1974 new_y = sin_a * dx + cos_a * dy + y;
1975 x = new_x;
1976 y = new_y;
1977 } else {
1978 x += dx;
1979 y += dy;
1980 }
1981 if (!last_was_text)
1982 pdf_puts(s, "BT\n");
1983 if (state->font_id != font->obj.id || node->size != state->font_size) {
1984 state->font_id = font->obj.id;
1985 state->font_size = node->size;
1986 pdf_puts(s, "/F");
1987 pdf_putint(s, font->obj.id);
1988 pdf_puts(s, " ");
1989 pdf_putnumber(s, node->size);
1990 pdf_puts(s, " Tf\n");
1991 }
1992 if (node->angle == 0) {
1993 pdf_puts(s, "1 0 0 1 ");
1994 } else {
1995 pdf_putnumber(s, cos_a);
1996 pdf_puts(s, " ");
1997 pdf_putnumber(s, sin_a);
1998 pdf_puts(s, " ");
1999 pdf_putnumber(s, -sin_a);
2000 pdf_puts(s, " ");
2001 pdf_putnumber(s, cos_a);
2002 pdf_puts(s, " ");
2003 }
2004 pdf_putnumber(s, x);
2005 pdf_puts(s, " ");
2006 pdf_putnumber(s, y);
2007 pdf_puts(s, " Tm\n");
2008 pdf_puts(s, "(");
2009 for (p = (const unsigned char*)node->text; *p; p++) {
2010 switch (*p) {
2011 case '(':
2012 case ')':
2013 case '\\':
2014 case '\n':
2015 case '\r':
2016 case '\t':
2017 pdf_puts(s, "\\");
2018 /* fall-through */
2019 default:
2020 if (*p >= 126) {
2021 snprintf(tmp, sizeof(tmp), "\\%03o", *p);
2022 pdf_puts(s, tmp);
2023 } else {
2024 pdf_put(s, (const char*)p, 1);
2025 }
2026 }
2027 }
2028 pdf_puts(s, ") Tj\n");
2029 if (!next_is_text)
2030 pdf_puts(s, "ET\n");
2031 }
2033 static void pdf_write_content(pdf_state *state)
2034 {
2035 gfx_node_t *node;
2036 int last_was_text = 0, next_is_text;
2037 for (node = state->canvas->firstnode; node; node = node->next) {
2038 switch (node->type) {
2039 case GFX_LINE:
2040 case GFX_AREA:
2041 pdf_write_linearea(state, node);
2042 break;
2043 case GFX_TEXT:
2044 next_is_text = node->next && node->next->type == GFX_TEXT;
2045 pdf_write_text(state, node, last_was_text, next_is_text);
2046 break;
2047 }
2048 last_was_text = node->type == GFX_TEXT;
2049 }
2050 }
2052 static void pdf_init_document(pdf_state *state)
2053 {
2054 pdf_init_buffer(state, &state->pdf_header);
2055 pdf_init_dict(state, &state->catalog_obj);
2056 pdf_init_dict(state, &state->pages_obj);
2057 pdf_init_dict(state, &state->page1_obj);
2058 pdf_init_dict(state, &state->fontsdict_obj);
2059 pdf_create_fonts(state);
2060 if (state->has_failed)
2061 return;
2062 /* make stream last object in file */
2063 pdf_init_object(state, &state->graph_stream);
2064 state->graph_stream.is_stream = 1;
2065 }
2067 static void pdf_setup_document(pdf_state *state)
2068 {
2069 /* all objects created by now, so init code can reference them */
2070 /* HEADER */
2071 pdf_puts(&state->pdf_header, "%PDF-1.3\n");
2072 /* following 8 bit comment is recommended by Adobe for
2073 indicating binary file to file transfer applications */
2074 pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
2075 /* CATALOG */
2076 pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
2077 pdf_putsi(&state->catalog_obj, "/Pages ");
2078 pdf_putint(&state->catalog_obj, state->pages_obj.id);
2079 pdf_puts(&state->catalog_obj, " 0 R\n");
2080 /* PAGES */
2081 pdf_putsi(&state->pages_obj, "/Type /Pages\n");
2082 pdf_putsi(&state->pages_obj, "/Kids [");
2083 pdf_putint(&state->pages_obj, state->page1_obj.id);
2084 pdf_puts(&state->pages_obj, " 0 R]\n");
2085 pdf_putsi(&state->pages_obj, "/Count 1\n");
2086 /* PAGE 1 */
2087 pdf_putsi(&state->page1_obj, "/Type /Page\n");
2088 pdf_putsi(&state->page1_obj, "/Parent ");
2089 pdf_putint(&state->page1_obj, state->pages_obj.id);
2090 pdf_puts(&state->page1_obj, " 0 R\n");
2091 pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
2092 pdf_putint(&state->page1_obj, state->page_width);
2093 pdf_puts(&state->page1_obj, " ");
2094 pdf_putint(&state->page1_obj, state->page_height);
2095 pdf_puts(&state->page1_obj, "]\n");
2096 pdf_putsi(&state->page1_obj, "/Contents ");
2097 pdf_putint(&state->page1_obj, state->graph_stream.id);
2098 pdf_puts(&state->page1_obj, " 0 R\n");
2099 pdf_putsi(&state->page1_obj, "/Resources << /Font ");
2100 pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
2101 pdf_puts(&state->page1_obj, " 0 R >>\n");
2102 }
2104 static void pdf_write_string_to_file(pdf_state *state, const char *text)
2105 {
2106 fputs(text, state->fp);
2107 state->pdf_file_pos += strlen(text);
2108 }
2110 static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
2111 {
2112 char tmp[40];
2113 buf->pdf_file_pos = state->pdf_file_pos;
2114 if (buf->is_obj) {
2115 snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
2116 pdf_write_string_to_file(state, tmp);
2117 }
2118 if (buf->is_dict)
2119 pdf_write_string_to_file(state, "<<\n");
2120 if (buf->is_stream) {
2121 snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
2122 pdf_write_string_to_file(state, tmp);
2123 pdf_write_string_to_file(state, "stream\n");
2124 }
2125 fwrite(buf->data, 1, buf->current_size, state->fp);
2126 state->pdf_file_pos += buf->current_size;
2127 if (buf->is_stream)
2128 pdf_write_string_to_file(state, "endstream\n");
2129 if (buf->is_dict)
2130 pdf_write_string_to_file(state, ">>\n");
2131 if (buf->is_obj)
2132 pdf_write_string_to_file(state, "endobj\n");
2133 }
2135 static void pdf_write_to_file(pdf_state *state)
2136 {
2137 pdf_buffer *buf = state->first_buffer;
2138 int xref_pos;
2139 state->pdf_file_pos = 0;
2140 pdf_write_buf_to_file(state, &state->pdf_header);
2141 while (buf) {
2142 if (buf->is_obj)
2143 pdf_write_buf_to_file(state, buf);
2144 buf = buf->next_buffer;
2145 }
2146 xref_pos = state->pdf_file_pos;
2147 fprintf(state->fp, "xref\n");
2148 fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
2149 /* TOC lines must be exactly 20 bytes including \n */
2150 fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
2151 for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
2152 if (buf->is_obj)
2153 fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
2154 }
2155 fprintf(state->fp, "trailer\n");
2156 fprintf(state->fp, "<<\n");
2157 fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
2158 fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
2159 fprintf(state->fp, ">>\n");
2160 fprintf(state->fp, "startxref\n");
2161 fprintf(state->fp, "%d\n", xref_pos);
2162 fputs("%%EOF\n", state->fp);
2163 }
2165 static void pdf_free_resources(pdf_state *state)
2166 {
2167 pdf_buffer *buf = state->first_buffer;
2168 while (buf) {
2169 free(buf->data);
2170 buf->data = NULL;
2171 buf->alloc_size = buf->current_size = 0;
2172 buf = buf->next_buffer;
2173 }
2174 while (state->font_list) {
2175 pdf_font *next = state->font_list->next;
2176 free(state->font_list);
2177 state->font_list = next;
2178 }
2179 }
2181 int gfx_render_pdf (gfx_canvas_t *canvas,
2182 art_u32 width, art_u32 height,
2183 gfx_color_t background, FILE *fp){
2184 struct pdf_state state;
2185 memset(&state, 0, sizeof(pdf_state));
2186 state.fp = fp;
2187 state.canvas = canvas;
2188 state.page_width = width;
2189 state.page_height = height;
2190 state.font_id = -1;
2191 state.font_size = -1;
2192 state.font_list = NULL;
2193 state.linecap = -1;
2194 state.linejoin = -1;
2195 pdf_init_document(&state);
2196 /*
2197 pdf_set_color(&state, background);
2198 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
2199 height, width, height, width);
2200 */
2201 if (!state.has_failed)
2202 pdf_write_content(&state);
2203 if (!state.has_failed)
2204 pdf_setup_document(&state);
2205 if (!state.has_failed)
2206 pdf_write_to_file(&state);
2207 pdf_free_resources(&state);
2208 return state.has_failed ? -1 : 0;
2209 }